db to config file

moved quite a bit of config options to config file from db, not much left in the site configuration page now

follow the commits to see the work

NOTE: no liquibase migrations provided as we're getting rid of the db anyway, this will let us roll back in case we need to
There's a fair bit of repetition here, particularly `Portal.app.config`. Perhaps a local variable could make this tidier?

It looks like we already tried it by creating `this.appConfig`...